The Borland data Provider comes with one set of components (with the Bdp prefix) that can connect to any of the supported databases, and can switch just by changing the connection string.
Borland Data Provider中提供了一组组件(其前缀为Bdp)，它们可以连接到任何支持的数据库上，可以只通过修改连接字符串来实现连接的切换。
2
Both blocks of code evaluate an int value using a switch statement that results in a human-readable string value printed to the console.
这两个代码块都会使用switch语句计算int值，从而得到输出到控制台的供人阅读的字符串值。
3
You saw different ways of referring to home directories, and you learned about the little-known CD shuffle, which allows you to substitute a string in your current path and switch to a new path.